Pardhasaradhi Teluguntla, Jun Xiong, and Prasad Thenkabail Global Cropland Extent Version 1.0 (GCE...

Pardhasaradhi Teluguntla, Jun Xiong, and Prasad Thenkabail

Global Cropland Extent Version 1.0 (GCE V1.0)

January 16-17, 2014 third Workshop on Global Food Security Analysis Data @ 30 m (GFSAD30)

Menlo Park, California, USA

U.S. Geological SurveyU.S. Department of Interior

U.S. Department of the InteriorU.S. Geological Survey


Goal



Overarching Goal

The Ultimate Goal of this sub-project is to produce an accurate global cropland extent (GCE) map at nominal 30 m resolution

Note: Global cropland extent is one of the 5 products we will produce in the GFSAD30 NASA MEaSUREs Project.



Approach



Approach: three stages to reach the goalWe will achieve global cropland extent @ 30 m in 3 distinct stages

1. GCE 1.0 (1 km)A global cropland extent map @ 1 km will be produced based on the synthesis of best available existing global extent maps. This will be released at nominal 1 km resolution as version 1.0 product.

2. GCE 2.0 (250 m)MODIS 250 m resolution monthly maximum value composite (MVC) NDVI time-series data will be used to refine the version 1.0 product to produce a more refined nominal 250m resolution as version 2.0 product.

3. GCE 3.0 (30 m)Landsat 30m resolution NDVI data will be used to refine the version 2.0 product to produce further refined accurate nominal 30 m resolution as version 3.0 product.



GCE V1.0 (nominal 1 km)


Global Cropland Extent Version 1.0 (GCE 1.0) Global cropland extent at nominal 1km Resolution

Existing Global cropland products:

A. Thenkabail et al. (2009) (Thenkabail et al., 2009, Biradar et al., 2009,Thenkabail et al., 2011)

B. Pittman et al. (2010)

C. Yu et al., (2013)

Existing Global Croplands in Global Land Use Land Cover product:

D. Friedl et al. (2010) ……we will use the above 4 products to come up with a refined GCE V1.0



GCE V1.0 (nominal 1 km) Final Product



based on Thenkabail et al. 2009, Pittman et al. 2010, Yu et al., 2013 and Friedl et al.2010

~2.3 billion hectares full pixel area (FPAs)



based on Thenkabail et al. 2009, Pittman et al. 2010, Yu et al., 2013 and Fried et al.2010

Class# Class Description Pixels Percent

# Names unitless %

1 1. Global cropland extent 23493936 100%

2 2.Cropland minor fractions 13700176

3 3.Cropland insignificant fractions 44662570

Note1

1= aprroximately 2.3 billion hectares Cropland estimated from 4 sources

Table : Global cropland extent at nominal 1-km based on three major studies: Thenkabail et al. (2009), Pittman et al. (2010), Yu et al. (2013) and Fried et al.(2010). Three class map.




~2.3 billion hectares full pixel area (FPAs) with 34% irrigated and 66% rainfed.





# Names unitless %1 Croplands all 4, irrigated 2802397 12%2 Croplands 3 of 4 , irrigated 289591 1%3 Croplands all 4, rainfed 1942333 8%4 Croplands 3 of 4, rainfed 427731 2%5 Croplands, 2 of 4, irrigation dominance 3220330 14%6 Croplands, 2 of 4, irrigation dominance 1590539 7%7 Croplands, 3 of 4, rainfed dominant 6206419 26%8 Croplands, 2 of 4, rainfed dominance 3156561 13%9 Croplands, minor fragments, 2 of 4 3858035 17%

10 Croplands, insignificant fragments, 2 of 4 6825290

11 Croplands, minor fragments, 1 of 4 6874886

12 Croplands, insignificant fragments, 1 of 4 44662570Class 1 to 9 total 23493936 100%

Note:

1=appriximately 2.3 billion heactars

2 = % calculated based on class 1 to 9. Class10,11 and 12 are minor cropland fragements3= all 4 means , all 4 studies agreed

Table : Global cropland extent at nominal 1-km based on three major studies: Thenkabail et al. (2009), Pittman et al. (2010), Yu et al. (2013) and Fried et al.(2010). Twelve class map.


Global Cropland Extent Version 1.0 (GCE V1.0) Products used to Produce GCE V1.0

(nominal 1 km) 1.0 Thenkabail et al. 2009


Global Cropland ExtentThenkabail et al., 2009; Global Cropland extent Map @ nominal 1 km



Table 2a. Global cropland extent at nominal 1-km based on Thenkabail et al. (2009).

Class# Class Description Pixels Percent# Names unitless %1 Croplands, irrigated dominance 9359647 40%2 Croplands, rainfed dominance 14273248 60%3 Natural vegetation with minor cropland fractions 55040374 Natural vegetation dominance with very minor cropland fractions 44170083

23632895 100%

Note:1 = approximately, Total 2.3 billion hectares. Note that these are full pixel areas.2 = % calculated based on class 1 and 2. Class 3 and 4 are v.small cropland fragements

Global Cropland ExtentThenkabail et al., 2009; Global Cropland extent Map @ nominal 1 km



(nominal 250 m) 2.0 Pittman et al. 2010


Global Cropland ExtentPittman et al., 2010; Global cropland extent map nominal @ 250 m

~0.9 billion hectares full pixel area (FPAs). There is no irrigated or rainfed


Table 2b. Global cropland extent at nominal 250 m based on Pittman et al. (2010).

Class# Class Description Pixels Percent# Names unitless %1 Croplands 8948507 100Note:1 = approximately, Total 0.9 billion hectares; Note that these are full pixel areas.2 = % calculated based on class 1 .

Global Cropland ExtentPittman et al., 2010; Global cropland extent map @ nominal 250 m



(nominal 30 m) 3.0 Yu et al. 2013


Global Cropland ExtentYu et al., 2013; Global cropland extent map @ nominal 30m



Global Cropland ExtentYu et al., 2013; Global cropland extent map at nominal 30m

Class# Class Description Pixels Percent# Names unitless %1 Croplands (classes 10 to 14) 7750467 35%2 Bare-cropland(classes 94 and 24) 14531323 65%

22281790 100%

Note:1 = approximately, Total 2.2 billion hectares. Note these are full pixel areas2 = % calculated based on class 1 and 2.

Table 2c. Global cropland extent at nominal 30 m based on Yu et al. (2013).



(nominal 500 m) 4.0 Friedl et al. 2010



Global Cropland ExtentFriedl et al., 2010; Global cropland extent map @ nominal

500m


Global Cropland ExtentFriedl et al., 2010; Global cropland extent map @ nominal

30m


# Names unitless %

1 Global croplands (Class 12 and 14) 122527635 100%

Note:1= apprximately 2.7 billion hactares based on GLC class12 and 14

Table 2d. Global cropland extent at nominal 500 m based on Fried et al. (2010).


Global Cropland Extent Version 1.0 (GCE V1.0) Products used to Produce GCE V1.0 (nominal 1 km) Thenkabail et al. 2009 and Pittman et al.,

2010



based on Thenkabail et al. 2009 and Pittman et al. 2010


Table 3. Global cropland extent from Thenkabail et al. (2009) and Pittman et al. (2010).

# Names unitless %1 Thenkabail Irrigated + Pittman Croplands 3054627 20%2 Thenkabail rainfed + Pittman Croplands 2136081 14%3 Thenkabail irrigated 6305020 41%4 Pittman croplands 1263226 8%5 Pittman croplands+ Thenkabail irrigated minor Croplands 738568 5%6 Pittman croplands+ Thenkabail rainfed minor Croplands 1756005 12%7 Thenkabail rainfed minor fractions of croplands, significant natural vegetation 121371678 Thenkabail irrigated very minor fractions of croplands,mostly natural vegetation 47654699 Thenkabail rainfed very minor fractions of croplands,mostly natural vegetation 42414078

15253527 100%

Note:1 = approximately, Total 1.5 billion hectares. Note that these are full pixel areas.2 = % calculated based on class 1 to 6. Class 7, 8, and 9 are v.small cropland fragements


based on Thenkabail et al. 2009 and Pittman et al. 2010



based on Thenkabail et al. 2009, Pittman et al. 2010, and Yu et al., 2013

~2 billion hectares full pixel area (FPAs) with 40% irrigated and 60% rainfed.


Table . Global cropland extent at nominal 1-km based on three major studies: Thenkabail et al. (2009), Pittman et al. (2010), and Yu et al. (2013). Six class map.

Class# Class Description Pixels Percent# Names unitless %

1 Croplands, all 3, irrigated 3091988 162 Croplands, all 3, rainfed 2370064 123 Croplands, 2 of 3, rainfed dominant 9362980 484 Croplands, 1 of 3, irrigated dominant 4810874 255 Croplands, minor fragments, 1 of 3 107329216 Croplands, insignificant fragments, 1 of 3 47599306

Class 1, 2, 3, and 4 Total 19635906 100Note:1 = approximately, Total 2 billion hectares2 = % calculated based on class 1 to 4. Class 5 and 6 are v.small cropland fragements3 = all 3 means that all 3 studies agree and so on






~2 billion hectares full pixel area (FPAs) with 40% irrigated and 60% rainfed.


Table 3b. Global cropland extent at nominal 1-km based on three major studies: Thenkabail et al. (2009), Pittman et al. (2010), and Yu et al. (2013). Three class map.

Class# Class Description Pixels Percent# Names unitless %

1 Croplands, irrigated dominance 7902862 40

2 Croplands, rainfed dominance 11733044 60

3 Natural vegetation with minor croplands fragments 10732921Class 1 and 2 Total 19635906 100

Note:1 = approximately, Total 2 billion hectares2 = % calculated based on class 1 and 2. Class 3 is minor cropland fragements





GCE V1.0 (nominal 1 km) Final Product



based on Thenkabail et al. 2009, Pittman et al. 2010, Yu et al., 2013 and Friedl et al.2010






# Names unitless %1 Croplands all 4, irrigated 2802397 12%2 Croplands 3 of 4 , irrigated 289591 1%3 Croplands all 4, rainfed 1942333 8%4 Croplands 3 of 4, rainfed 427731 2%5 Croplands, 2 of 4, irrigation dominance 3220330 14%6 Croplands, 2 of 4, irrigation dominance 1590539 7%7 Croplands, 3 of 4, rainfed dominant 6206419 26%8 Croplands, 2 of 4, rainfed dominance 3156561 13%9 Croplands, minor fragments, 2 of 4 3858035 17%



12 Croplands, insignificant fragments, 1 of 4 44662570Class 1 to 9 total 23493936 100%

Note:


2 = % calculated based on class 1 to 9. Class10,11 and 12 are minor cropland fragements3= all 4 means , all 4 studies agreed

Table : Global cropland extent at nominal 1-km based on three major studies: Thenkabail et al. (2009), Pittman et al. (2010), Yu et al. (2013) and Fried et al.(2010). Twelve class map.



GCE V1.0 (nominal 1 km) Issues and Problems



Issues and Problems: Example 1, Australia



Issues and Problems: Example 2, Africa



Issues and Problems: Example 3, Africa



GCE V2.0 (nominal 1 km) Issues and Problems



Approach: three stages to reach the goalWe will achieve global cropland extent @ 30 m in 3 distinct stages

1. GCE 1.0 (1 km)A global cropland extent map @ 1 km will be produced based on the synthesis of best available existing global extent maps. This will be released at nominal 1 km resolution as version 1.0 product.

2. GCE 2.0 (250 m)MODIS 250 m resolution monthly maximum value composite (MVC) NDVI time-series data will be used to refine the version 1.0 product to produce a more refined nominal 250m resolution as version 2.0 product.

3. GCE 3.0 (30 m)Landsat 30m resolution NDVI data will be used to refine the version 2.0 product to produce further refined accurate nominal 30 m resolution as version 3.0 product.



Documentation

1. DocumentationA. Available in ftp shareB. Contact Pardha

How do we further refine and improve???

U.S. Geological SurveyU.S. Department of Interior U.S. Geological SurveyU.S. Department of Interior


Issues and Problems: Way Forward

Thank you


Other Slides May not Need


Class 1 = Irrigated pure = 1,2,3,4,5,7,12,14,20Class 2 = Irrigated with some mix of natural vegetation = 6,8,9,10,11,13Class 3 = Irrigated with significant mix of natural vegetation = 15,16,17,18,19 Class 4 = Irrigation supplemental pure = 21,25Class 5 = Irrigated supplemental mixed with significant rainfed = 22Class 6 = Irrigated supplemental with some natural vegetation = 23,24Class 7 = Irrigated supplemental with significant natural vegetation = 26,27,28Class 8 = LULC with irrigated = 29,30,31,32,33,34

Global Cropland Extent (Irrigated Cropland Extent) GIAM @ nominal 1 km (based on AVHRR+SPOT VGT+Secondary)

New 8 irrigated area classes @ nominal 1 km derived from 34 classes


Class 1 = Irrigated pure = 1,2,3,4,5,7,12,14,20Class 2 = Irrigated with some mix of natural vegetation = 6,8,9,10,11,13Class 3 = Irrigated with significant mix of natural vegetation = 15,16,17,18,19 Class 4 = Irrigation supplemental pure = 21,25Class 5 = Irrigated supplemental mixed with significant rainfed = 22Class 6 = Irrigated supplemental with some natural vegetation = 23,24Class 7 = Irrigated supplemental with significant natural vegetation = 26,27,28Class 8 = LULC with irrigated = 29,30,31,32,33,34

Global Cropland Extent (Irrigated Cropland Extent) GIAM @ nominal 1 km (based on AVHRR+SPOT VGT+Secondary)

New 8 irrigated area classes @ nominal 1 km derived from 34 classes

Class 1 = Croplands, irrigated dominance = 1,2,4,5,6,,7 (GIAM 8classes)

Class 3 = Natural vegetation with minor cropland fractions = 3, 8 (GIAM 8classes)

2 irrigated cropland classes @ nominal 1 km derived from 8 classes


Global Cropland Extent (Rainfed Cropland Extent) GMRCA @ nominal 1 km (based on AVHRR+ SPOT VGT +

Secondary)

Class 1 = Rainfed croplands with some mix of natural vegetation = 1,2,3,4Class 2 = Rainfed croplands with some mix of woodlands, forests = 5,6,7Class 3 = Rainfed croplands with mix of wetlands, supplemental, and natural vegetation = 17,18Class 4 = Natural savanna vegetation and rainfed cropands mix = 8,9,10,11,12Class 5 = Natural woodlands, forests and rainfed croplands mix = 13,14,15,16

New 5 rainfed area classes @ nominal 1 km derived from 18 classes


Global Cropland Extent (Rainfed Cropland Extent) GMRCA @ nominal 1 km (based on AVHRR+ SPOT VGT +

Secondary)

New 5 rainfed area classes @ nominal 1 km derived from 18 classes

Class 2 = Croplands, rainfed dominance = 1,2,3 (GMRCA 5classes)

Class 4 = Natural vegetation dominance with very minor cropland fractions = 4,5 (GMRCA 5classes)

2rainfed area croplandsclasses @ nominal 1 km derived from 5 classes

Class 1 = Irrigated pure Class 2 = Irrigated with some mix of natural vegetation Class 4 = Irrigation supplemental pure Class 5 = Irrigated supplemental mixed with significant rainfed Class 6 = Irrigated supplemental with some natural vegetation Class 7 = Irrigated supplemental with significant natural vegetation

Class 3 = Irrigated with significant mix of natural vegetation Class 8 = LULC with irrigated

Class 1 = Rainfed croplands with some mix of natural vegetation Class 2 = Rainfed croplands with some mix of woodlands, forests Class 3 = Rainfed croplands with mix of wetlands, supplemental, and natural vegetation

Class 4 = Natural savanna vegetation and rainfed croplands mix Class 5 = Natural woodlands, forests and rainfed croplands mix

GIAM

GMRCA

Global Cropland Extent

Class 1 = Croplands, irrigated dominance = 1,2,4,5,6,,7 (GIAM 8classes)

Class 2 = Croplands, rainfed dominance = 1,2,3 (GMRCA 5 classes)

Class 3 = Natural vegetation with minor cropland fractions = 3, 8 (GIAM 8classes)

Class 4 = Natural vegetation dominance with very minor cropland fractions = 4,5 (GMRCA 5 classes)

4 cropland classes @ nominal 1 km derived from of GIAM 8 classes and GMRCA 5 classes

Global Cropland ExtentCroplands Level1





# Names unitless %

1 Croplands, irrigated major (3 of 4 or 4 of 4 ) 3091988 13%

2 Croplands, irrigation minor (2 of 4) 4810869 21%

3 Croplands, rainfed major ( 3 of 4 or 4 of 4) 2370064 10%

4 Croplands, rainfed minor (2 of 4 or 3 of 4) 9362980 40%

5 Croplands, minor fragments, 2 of 4 3858035 16%




Class 1,2,3,4 and class 5 total 23493936 100%

Note:


2 = % calculated based on class 1 ,2,3,4,and 5. Class 6,7 and 8 are minor cropland fragments

Table : Global cropland extent at nominal 1-km based on three major studies: Thenkabail et al. (2009), Pittman et al. (2010), Yu et al. (2013) and Fried et al.(2010). Eight class map.

Pardhasaradhi Teluguntla, Jun Xiong, and Prasad Thenkabail Global Cropland Extent Version 1.0 (GCE...

Documents

Transcript of Pardhasaradhi Teluguntla, Jun Xiong, and Prasad Thenkabail Global Cropland Extent Version 1.0 (GCE...